Method for detecting grouting fullness of grouting sleeve

The invention discloses a method for detecting grouting fullness of a grouting sleeve, which comprises the following steps of: preparing standard grouting liquid, carrying out neutron detection on grouted and ungrouted sleeves at detection points one by one, and taking a detection result as a reference standard neutron number library; neutron detection is carried out before a sleeve in a component is grouted, and the measured number of neutrons serves as a background value; the sleeve in the component is grouted through prepared standard grouting liquid, neutron detection is carried out on detection points one by one, and the measured neutron number is a band background value; subtracting the band background value from the background value to obtain the actually measured neutron number of the inner sleeve of the component; and comparing and analyzing the actually measured neutron number of the inner sleeve of the component with the reference standard neutron number to finally obtain a detection result. Accord